Ramification groups of coverings and valuations

Abstract

We give a purely scheme theoretic construction of the filtration by ramification groups of the Galois group of a covering. The valuation need not be discrete but the normalizations are required to be locally of complete intersection.

44 pages

References in corpus (2)

• Wild ramification and the characteristic cycle of an l-adic sheaf
• Relative Riemann-Zariski spaces